2674 search results - page 151 / 535 » Data Models and Query Languages for Spatial Databases |
159
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VLDB
1994
ACM
15 years 9 months ago
1994
ACM
Most declarative SQL-like query languagesfor object-oriented database systems (OOSQL) are orthogonal languages allowing for arbitrary nesting of expressions in the select-, from-,...
238
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SIGMOD
2009
ACM
16 years 5 months ago
2009
ACM
We present a complete XPath cost-based optimization and execution framework and demonstrate its effectiveness and efficiency for a variety of queries and datasets. The framework i...
118
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SIGMOD
2003
ACM
16 years 5 months ago
2003
ACM
: There has been an abundance of research within the last couple of decades in the area of multilevel secure (MLS) databases. Recent work in this field deals with the processing of...
155
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COMGEO
2010
ACM
15 years 8 months ago
2010
ACM
Today sophisticated concepts, languages and frameworks exist, that allow implementing powerful fine grained access control systems for protecting Web Services and spatial data in ...
139
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PODS
2007
ACM
16 years 5 months ago
2007
ACM
This paper gives an overview of recent work on machine models for processing massive amounts of data. The main focus is on generalizations of the classical data stream model where...